21112011200999 has 4 divisors (see below), whose sum is σ = 21113420280336. Its totient is φ = 21110602121664.

The previous prime is 21112011200933. The next prime is 21112011201011. The reversal of 21112011200999 is 99900211021112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112011200999 - 2²⁰ = 21112010152423 is a prime.

It is a super-2 number, since 2×21112011200999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112011200299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704517194 + ... + 704547159.

It is an arithmetic number, because the mean of its divisors is an integer number (5278355070084).

Almost surely, 2^{21112011200999} is an apocalyptic number.

21112011200999 is a deficient number, since it is larger than the sum of its proper divisors (1409079337).

21112011200999 is a wasteful number, since it uses less digits than its factorization.

21112011200999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409079336.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 21112011200999 in words is "twenty-one trillion, one hundred twelve billion, eleven million, two hundred thousand, nine hundred ninety-nine".